Fire-extinguisher.



C. SNYDBR.

FIRE EXTINGUISHBR.

APPLIGATIOH FILED HAY za, 1912.

Panwd July 2l, 1914,

iN VE. N TGF? s 'rus FIRE-EXTINGUISHER.

specification of Letters Patent.

Patenten July ai, 1914.

Application med May 23, 1912. Serial No. 699,128.

To all whom it may concern.'

Be it known that I, CAssIN s nrnnn, a citizen of the United States, resldin 1n the city of Philadelphia, county of P iladelphia, and State of Pennsylvania, have linvented certain new and useful Improvements in Fire-Extinguishers, of which the followin is a specification.

ly invent-ion relates to tire extinguishers, and more particularly to portable ireextinguishers which may be promptly set into operation and the tire extinguishing contents directed at will by the operator.

My invention resides in a lire extinguisher which is easily put into operation and which thereafter automatically produces fluid or gas pressure which operates either directly upon the lre extinguishing mater1al or through the medium of a plun r or piston to expel the same, the gas or uid pressure producing means, however, being isolated from the re extinguisher material, that is to say, the gas or fluid pressure is produced independently of the lire extinguishing `material and exerted thereon to expel the same.

My invention resides in features hereinafter described and claimed.

F or an illustration of some of the forms my invention may take reference is to be had to the accompanying drawing, 1n which:

Figure 1 is a longitudinal sectional' v1ew of a lire .extinguisher involving my invention, some parts being shown in e ovation. Fig. 2 is a plan uiew, some parts 1n section, on the line .AL- A of Fig. 1, withthe dome removed? Fig. `3 is a longitudinal sectional view, some parts in elevation, of a modified form of extinguisher. Fig. 4 is a plan view, some parts in section, on the line B-B of F ig. 3, with the dome removed. -1 A' A The casing or chamber formin member 1 is provided at its one end wit a cap.2 screw threaded at 3 to receive stop cock 4 having the usual handle 5 for opening and closing the same. Within the casing 1, in the end next to the.' cap 2, is stored any suitable material, preferably liquid, such as ire extinguishing material, awell known form of which is carbon tetrachlorid. Near the other end of the chamber or casing 1 and within the same is provided a piston or plunger 6 provided with leather or other packing 7 held to the piston G by plate S held to the piston 6 bythe screw 0. The piston 6 has a screw fitted shank 10 threading into the shank 11,' or the shank 11 and the piston 6l may be integral with each other. On the shank 11 is the guide member 12 which may conform to the cross section of the chamber 1 and it more or less closely therein, so as to act as a guide for the piston to prevent the same from tilting and binding within the bore of the chamber 1. The member 12 is provided with a suitable openin or openings 13 to allow admission of flui or gas under pressure back of the piston or lunger. Beyond the piston or plunger is t e member 14, av metal casting or of other suitable material, ittin snugly within the casing 1 and soldere or ot erwise secured thereto. The member 14 has a cavity 15 in which may be stored any suitable chemical such as bicarbonate of soda in dry or powdered form, contained, if desired, in the removable cup 15a. At the ends of the cavity 15 are provided ledges 16 upon which rests a fragile receptacle 17, such as a lass bottle, havlng the ground stopper 18. his bottle 17 contains preferably an acid, such as hydrochloric or sulfuric acid, or any acid or material which when comin into contact Withthe chemical in the cavity, 15 will freely and energetically liberate gas. The bottle 17 ishere shown as of peculiar shape, as seen in plan in Fig. 2, but it is to be understood that my invention is not limited in this regard for a bottle of any suitable shape may be employed.

The member 14 has the lugs, or ears 19 extending outwardly beyond the casing or chamber 1 and with these ears or lugs register corresponding ears or lugs 20 upon the ,dome member 21, the two members being secured together by the bolts or screws 22 which draw the two members snugly t0- gether, a gasket or packing 23 intervening to make gas tight joints which will withstand considerable pressures. The gasket 23 may be of `any snitable material such as lead, rubber, or other more or less yielding material, or a corrugated copper gasket may be employed.

At lts top the dome 21 has an aperture at 24 through which extends the rod 25 carrying at its lower end the member 26 resting upon or adapted to engage the bottle or other fragile vessel 17. The member 26 may be ot elongated form as indicated in Fig. 2 and to prevent the same from turning about the axis of the rod 25, the rod 25 may llc square in section Where it passes through ber 26 may be provided. Upon 'the outer: end of the rod 25 may be provided a button or head 27. `llear'the aperture 24fthedome has the ground seat 28 with whichengages the ground member 29 secured upon the..

rod 25, the member 29 being here shown,l by way of example, as conical in shape. Within the dome 21 is the annular flange 429 to A shown wherein oneof the chemicals is placed "which is secured by screw threads, brazing, lor otherwise, the hollow linder 30 having the lower closing ca 31. t rough" which the `rod 25 extends. Wit in'the cylinder 30 and surrounding the rod 25 is provided a spring p 32 which presses themember 29 against its seat 28, the other end of the spring resting upon .the cap 31. Extending .through the bottom ofthe member 14 is a tube 33 which extends upwardly into the dome near the topinner wall thereof, such tube forming a assage from the dome into the space beow t e member 14 and above lthe plunger or iston.

chamber 1 filled with tire extinguishing material, and with suitable chemicals* in the cup 15a and in the bottle 17, in case lof tire,

the operator picks up the extinguisher and strikes the button or head 27 against a wall. or other object thus forcing the rod 25 inwardly in opposition to spring 32 and causing the hammer or member 26 to break'the fragile receptacle 17, which allows the acid or otherv material to escape and come into ger or piston;l If now the handle 5 of 'the' stop cock 4 be turned the gas pressure will propel the piston through the chamber 1 forcing the fire extin ishing material y through the`cock'4 and t e operator directs l the material upon the fire as `the material is -so expelled. In case the stop cock 4 remains shut ofi', or if for an other lreason the, as pressure attains too igh a value, relie l.is l, given by the safety valve 34 held against its seatv 35 by the stiff spring 36. When the pressure'reaches a ipredetermined value the valve 34 will be li ted from its seat in op position to its spring 36 and relief will be given through the ports 37. Y

The safety valve, as indicated in Fig. l, is so positioned that the piston or plunger may first expel all of the fire extinguishing material and come to rest at the lower end he operationv is `as follows: With the.

of the easing 1, and the plunger having passedl the oint-ofcommunication of the valvevwith t e entry of the chamber 1, any

:excessive 'gas pressure will similarly relieve litself through the valve. It is to be understood, however, that'the safety valve may be placed just belowv the member 14, or it may communicate withI the gas producing chamber formed by the Ldome 21,.'geand the member14. v

In Figs. 3 and4'a-m'odilied construction is in the bottom'of the member 14 carrying the posts 38 having a ertures receiving the piv ots 39 upon a bott e or container 40 containing acid or other chemical. The receptacle 40 is closed by the cover 41 ,carried at the bottom of the rod 25 extendi through the bottom cap 3l' of the cylindric'a casing member 30 in which is provided a spring 32- confined between the cap 31 and the member 29, which is ground, and adapted to engage the ground seat 28. In this case the dome 21 has a screw threaded aperture 24EL receiv ing the screw threads 42 upon the rod 25` which terminates at its outer end in the handle or knurled head 43. When it is desired to use this form of extinguisher the operator turns the handle 43-to remove the screw threads 42 from the aperture 248. When this operation is completed the spring 32 expands lifting the rod 25, seating the member 29 in its seat 28'and lifting the cover 41 from the receptacle l40. When the cover 41 is so removed therecep'tacle 40 is under decidedl unstable equilibrium and immediately fa ls, rotating upon its pivots 39 (which may be to one side of the center offreceptacle 40) and emptying out the contents, as acid, from the receptacle 40 onto 'the chemical within the member 14. Gras is tinguishing material. A safety valve, such as shown injFig 1 is also applicable to the construction shown in Fig. 3 and in like While I have shown in Iboth Figs. 1 and 3 a plunger or piston, it is to be understood that the plunger or piston may be omitted in those cases where the receptacle (1. is held upright 'or vertical,l in which case `the gas pressure Will beexerted at tiretop of the fire extinguishingluid oir-material and expel it preferably t roughrI hose, communicating with the bottomf of the receptacle, which `may be used to direct the fluid upon the fire. But Where'tthe receptacle is not to be held vertical or substantially so l prefer to' use a plunger or piston as shown.

The tubes 33 are shown as extending Well up into the dome so as to prevent entry into ico it of the powdered or other chemical contained iu themcmber 14.

VWhat- I vclaim is:

. 1. In a fire extinguisher, a chamber containing fire extinguishing material, a hollow member closing an end of said chamber, a dome member secured to said hollow member, a removable cup in said hollow member adapted to contain a chemical, an independ# ent chemical container, a rod extending through said dome, a s ring within said dome controlling said ro al casin for said spring, and means controlled by said rod ,for bringing the chemicals into contact to produce gas pressure.

Q. In a fire extinguisher, a chamber containing fire extinguishing materiaha hollow member forming a closure for one end of said chamber, said hollow member havin a pocket adapted to contain chemical material, ledges on said hollow member above said pocket, a fragile chemical container resting on said ledges and extending across said pocket. and means extending tothe exterior of said chamber for delivering a blow, t0 said fragile container.

3. In a ire extinguisher. a chamber having a compartment containing fire extinguishing material, an independent compartment containing chemicals for producing as pressure, a plunger adapted to expel the gre extinguishing material and subjected to said gas pressure, and a safety valve normally separated b v said plunger from the gas produced by said chemicals and adapted to be directlyY :subjected to the gas pressure after predetermined movement of said plunger.

4.- ln a fire extinguisher, the combination with a casing. of a. member filling one end thereof, a second member secured to said member, said members forming a chamber inclhepeiulent of said casing, normally ilsolated chemicals in said. chamber, ,means extending to the exterior for bringing said chemicals together, lire extinguishing material in said casing, a plunger fittfng wit-hf in said casing and isolating said fire extinguishing material from said members, and means forming a gas passage from said chamber to the side of said .plunger opposite to said lire extinguishin material.

5. In a-re extinguisher, t e combination with a casing, of a member closing one end thereof, a second member forming with said first member an independent chamber, as producing chemicals in said chamber, a fig ile container normallyiisolating one of said chemicals, a rod extendin to the exterior of said chamber for brea in said fragile container, a spring within sai chamber, and a spring casing secured to said second member, said spring normally exerting pressure on said rod away from said fragile container. 6. In a fire extinguisher, a casing containingfire extinguishing material, means forming an independent chamber closing one en of said casing, normally isolated chemicals in said chamber, means extending to the exterior for bringing said chemicals together, and means ,for conducting as to said casing extending to the end o' said chamber remote from said casing. 7

7. In a lire extinguisher, the combination with a main casing` containing fire extinguishing material, of a memberl completely filling the bore of said casing to form an end wall thereof, a second member secured to said member, said members having cavities forming a chamber independent of said main casing, normally isolated chemicals in said chamber adapted to produce as when brought. together, said first nam e member having a gas passage leading from said chamber into saidmain casing.

8. In a fire extinguisher, the combination with amain casing, of a plug filling the bore o'said casing to constitute an end wall' of said casing, a member secured to said plug and forming therewith a chamber independent of said main casing, fire extinguishing material in said main casing, a plunger in said main casin isolating Said lire extinguishing material rom said plug, saidpluv having a gas passage extending from sai chamber to the side of said plunger opposite to said fire extinguishing material.

'In testimony whereof I have hereunto affixed my signature in the presence of the two subscribing witnesses.

Cassin snrnnn.;

Witnesses:

BEATRICE WHITNEY, ELnANoa T. McCain 

